Lost ALL of my "Split Event titles", How do I get them back?

No, it's not about restoring my backup.

Look at the screenshot of my iPhoto Library. In the Selection Panel, I have selected "Photos (8,072)". If you look down in the Slection Panel, under "ALBUMS", you will see my folders from various events, "From Mobileme", "LostWEBoyz2012", etc. When I click on those folders, they DO show the photos that I've taken and placed in those specific folders. So, I photos are not lost. (Plus they are backed up on an externa; HD.

Now if you look to the right of the "Selection Panel" - The dark gray area, (under "PHOTOS"), this is another way to organize, sort your photos, by "EVENTS". You will notice that NONE of the "Events" are "TITLED." The date of when the photo(s) was (were) taken is listed. Previously to yesterday morning, ALL of these "UNTITLED EVENTS" had names, that is, they were "TITLED."

I was wondering if there was a way to recover the ORIGINAL TITLES (that I had assigned previously) to these "(SPLIT) EVENTS?"

I appreciate your original response.